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| Acceleration sensing ring laser gyroscope |
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| Micromechanical angular accelerometer with auxiliary linear accelerometer |
| OF THE INVENTION Referring to FIGS. 1 and 2, a micromechanical accelerometer 20 comprises a ... |
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| Vibrators vibratory gyroscopes a method of detecting a turning angular rate and a linear accelerometer |
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Spread spectrum frequency hopping system and method
| Details |
Inventors: Brennan, Jr., William J.;
Assignee: Neptune Technology Group Inc. (Tallassee, AL)
Primary Examiner: Pham; Chi
Assistant Examiner: Bayard; Emmanuel
Attorney, Agent or Firm: Dority & Manning
A frequency hopping spread spectrum wireless transmission system includes a transmitter and a receiver system. The transmitter is configured to transmit radio frequency data signals in sequential time periods on respective transmit channels according to a pre-determined sequence. The data signal in each time period includes information relating the data signal to its position within the pre-determined sequence. The receiver system is configured to monitor a plurality of receive channels over a frequency range that includes the transmit channels and to receive the data signals on the receive channels. The receiver system is also configured to determine, upon reception of a first data signal on a first receive channel, a next receive channel based on the first receive channel so that the next receive channel differs from the first receive channel an amount equal to the interval between the data signal's position and the next position in the sequence, and to monitor the next receive channel for a next data signal. |
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DETAILED DESCRIPTION The present invention recognizes and addresses the foregoing disadvantages, and others, of prior art constructions and methods.
Accordingly, it is an object of the present invention to provide an improved frequency hopping spread spectrum wireless transmission system.
More particularly, it is an object of the present invention to provide such a system that is able to compensate for frequency drift in the transmitter and/or the receiver.
Some of these objects are achieved by a frequency hopping spread spectrum wireless transmission system having a transmitter and a receiver system.
The transmitter is configured to transmit radio frequency data signals in sequential time periods on respective transmit channels according to a predetermined channel sequence.
The data signal in each time period includes information relating the data signal to its position within the predetermined sequence.
The receiver system is configured to monitor a plurality of receive channels over a frequency range that includes the transmit channels and to receive the data signals on the receive channels.
The receiver system is also configured to determine, upon reception of a first data signal on a first receive channel, a next receive channel based on the first receive channel so that the next receive channel differs from the first receive channel an amount equal to the interval between the data signal's position and the next position in the sequence, and to monitor the next receive channel for a next data signal.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate one or more embodiments of the invention and, together with the description, serve to explain the principles of the invention.
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Communications 
